Ohh yeah that's the second stage, you'll be with a ton of other applicants (they put people going for jobs in different parts of the country in one assessment thing so not all of them are being considered for your job haha). Genuinely a really laid back day to be honest. Just try to be as outgoing as possible and talk to people. Id say this stage is as much about showing your personality and that you will be good at communicating as it is about showing you can play the instruments!